Borawski, K. M., Norris, R. D., Fesperman, S. F., Vieweg, J. W., Preminger, G. M., & Dahm, P. (2007). 15: Levels of Evidence in the Urology Literature. In Journal of Urology (Vol. 177, pp. 5–6). Ovid Technologies (Wolters Kluwer Health). https://doi.org/10.1016/s0022-5347(18)30280-5

Borawski, Kristy M., Regina D. Norris, Susan F. Fesperman, Johannes W. Vieweg, Glenn M. Preminger, and Philipp Dahm. “15: Levels of Evidence in the Urology Literature.” In Journal of Urology, 177:5–6. Ovid Technologies (Wolters Kluwer Health), 2007. https://doi.org/10.1016/s0022-5347(18)30280-5.

Borawski KM, Norris RD, Fesperman SF, Vieweg JW, Preminger GM, Dahm P. 15: Levels of Evidence in the Urology Literature. In: Journal of Urology. Ovid Technologies (Wolters Kluwer Health); 2007. p. 5–6.

Borawski, Kristy M., et al. “15: Levels of Evidence in the Urology Literature.” Journal of Urology, vol. 177, no. 4S, Ovid Technologies (Wolters Kluwer Health), 2007, pp. 5–6. Crossref, doi:10.1016/s0022-5347(18)30280-5.

Borawski KM, Norris RD, Fesperman SF, Vieweg JW, Preminger GM, Dahm P. 15: Levels of Evidence in the Urology Literature. Journal of Urology. Ovid Technologies (Wolters Kluwer Health); 2007. p. 5–6.